diff --git a/module/rdd-possession.js b/module/rdd-possession.js
new file mode 100644
index 00000000..587936d7
--- /dev/null
+++ b/module/rdd-possession.js
@@ -0,0 +1,93 @@
+/* -------------------------------------------- */
+import { Misc } from "./misc.js";
+import { RdDDice } from "./rdd-dice.js";
+import { RdDUtility } from "./rdd-utility.js";
+import { RdDCombat } from "./rdd-combat.js";
+import { RdDResolutionTable } from "./rdd-resolution-table.js";
+import { RdDRoll } from "./rdd-roll.js";
+import { RdDRollTables } from "./rdd-rolltables.js";
+import { RdDItemCompetenceCreature } from "./item-competencecreature.js";
+
+/* -------------------------------------------- */
+/* On part du principe qu'une entité démarre tjs 
+une possession via le MJ (ie un joueur ne controle pas une entité)
+Donc la compétence Possession ne peut être démarrée que par le MJ.
+*/
+
+/* -------------------------------------------- */
+export class RdDPossession {
+
+  /* -------------------------------------------- */
+  static init() {
+    this.possessionList = [];
+  }
+
+  /* -------------------------------------------- */
+  static searchPossessionFromEntite( attacker, target) {
+    let poss = this.possessionList.find( poss => poss.entiteId == attacker.data._id && poss.pjId == defender.data._id);
+    return poss;
+  }
+
+  /* -------------------------------------------- */
+  static _onReussitePossession( r ) {
+    console.log("Success", r);
+    ui.notifications.warn("Succès du jet de Possession ! Mais La gestion des possessions n'est pas encore disponible, merci de la gérer manuellement");
+  }
+  /* -------------------------------------------- */
+  static _onEchecPossession( r ) {
+    console.log("Echec", r);
+    ui.notifications.warn("Echec du jet de Possession ! Mais La gestion des possessions n'est pas encore disponible, merci de la gérer manuellement");
+  }
+
+  /* -------------------------------------------- */
+  static async managePosession(attacker, competence ) {    
+    
+    const target = RdDCombat.getTarget();
+    if (target == undefined) {
+      ui.notifications.warn((game.user.targets?.size ?? 0) > 1
+        ? "Vous devez choisir <strong>une seule</strong> cible à posséder!"
+        : "Vous devez choisir une cible à posséder!");
+      return;
+    }    
+    
+    const defender = target.actor;
+    let possession = this.searchPossessionFromEntite( attacker, defender);
+    if ( possession) {
+      // Manage ongoing possession
+    } else {
+      this.createPossession(attacker, defender);
+    }
+
+    console.log("Creation de possession", attacker, defender, competence);
+    let rollData = {
+      competence: competence,
+    };
+    if ( attacker.isCreature()) {
+      RdDItemCompetenceCreature.setRollDataCreature(rollData);
+    }
+
+    const dialog = await RdDRoll.create( attacker, rollData,
+      {
+        html: 'systems/foundryvtt-reve-de-dragon/templates/dialog-roll-competence.html',
+        options: { height: 540 }
+      }, {
+      name: 'jet-possession',
+      label: 'Possession: ',
+      callbacks: [
+        { condition: r => (r.rolled.isSuccess), action: r => this._onReussitePossession(r) },
+        { condition: r => (r.rolled.isEchec), action: r => this._onEchecPossession(r) },
+      ]
+    });
+    dialog.render(true);
+  }
+
+  /* -------------------------------------------- */
+  static createPossession( attacker, defender ) {
+    let poss = { entiteid: attacker.data._id, 
+                 pjId: defender.data._id,
+                 possessionCount: 0, // Negative : conjuration, Positif : possession
+               }
+    this.possessionList.push( poss);               
+  }
+
+}
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